A number of quantity defining a limit that errors will not exceed when a device is used under specified operating conditions. Accuracy rating can be expressed in a number of forms, i.e. in terms of the measured variable (+/- 1 C), percent of span (+/-0.5% ...

An instrument of the aspiration condenser type which measures the concentration and mobility of small ions.

Sir Napier Shaw's name for the approximate absolute temperature scale,

A measure of the intensity of gusts given by the ratio of the total range of wind speed between gusts and the intermediate periods of lighter wind to the mean wind speed, averaged over both gusts and lulls.

Precipitation from a cumuliform cloud. Characterized by the suddenness of beginning and ending, by the rapid change in intensity, and usually by a rapid change in the condition of the sky. The solid or liquid water particles are usually bigger than the co ...

An instrument which measures the intensity of radiation by determining the amount of chemical change( or fluorescence produced by that radiation.

The frequency of a carrier wave.

Diffuse solar radiation which has the same intensity in all directions.

A small, limited-capacity central processing unit contained entirely on one semiconductor chip.

Value of soil moisture, expressed as a percentage of the mass of dry soil, below which a plant living in the soil dies by wilting.

A counterclockwise change in wind direction. Backing winds with height are indicative of cold air advection (CAA).

Binary Coded Decimal. A coding system in which each decimal digit from 0 to 9 is represented by a 4-digit binary number.

A set of electrical conductors, often on a backplane, that carry data and power signals among the various components of a computer.

An instrument which automatically determines the size distribution of raindrops.

The scientific study of the waters of the earth, especially with relation to the effects of precipitation and evaporation upon the occurrence and character of water in streams, lakes, and on or below the land surface. In terms of the hydrologic cycle, the ...

Contraction for pilot balloon observation.

Defect in the action of an aneroid barometer resulting in a sluggish adjustment of the index toward the correct reading when the barometer is subjected to a large and rapid change in pressure.

A recording hair hygrometer.

A measure of long-term precipitation effectiveness. The ratio of the normal annual rainfall to the normal annual evaporation.

Solar and terrestrial radiation directed downwards (towards the earth's surface); incoming radiation.